Baking-oven.



w. s. COR'BY & J. L. PARSONS, JR-

BAKING OVEN.

APPLICATION HLED immw, 1913. Patented May 11, 1915' I m k riiirsisir series;

Winnram s. consr MID JAMES nfireesolvs, JP, or weesmerow, msirmo'r or converters.

sairtirsovstr. I

Original application ales Gcto'cer 12, 912, 1

To all whom it may concern Be it known that W67 Wimiaic S. Comerand JA Es L. Pass ens, 5K2, citizens of the United States, residing at Washington, in

present invention more particularly relates are the novel characteristics of the rotary hearth sections or pan carriers and their relations to the rotary carrying elements of the reel consider-cal in conjunction with the heating drum and the furnace. & The novel features which characterim more particularly the firing chamber and the heating drum have been made the subjectsmatter of claims in our earlier ap lication Serial No. 725 514, upon which Patent No. 1,107,195 was granted August 11 191%, and. to which referencecan he made for an 'understancling of the details supplemental to those which as aforesaid, are incident to the baking pans or rotary hearths, and thematters-of relationship of these to the immediate adjacent parts.

In the drawings: Figure 1 is a front elevation oi the oven, parts of the. charging floor being broken away; Fig. 2 is a real-relevation' Fi 8 is a transverse vertical sec- 1 T. tionarview; r 1g. 4%. shows in cross section the preferred I'orrn oi tray oottorn on an enlarged scale: anti S-antl 5 a longi- 4G tndinal section and section of mocl1- fiecl form. oi" v l:-

. c in 110 i '(letai l, ti

', wits a:

5 to Willi. 6. in the chamber is :30 There ilower pm. supplied in the tunnel The precincts of combos" tion can pass the tanneis and 2"? over {specification of Zetters Patent.

1 ing stifi'eneol by bars 12.

carried on.

rat vfrom. the re on grate :43.

races-tee May ii, 1e15,

Ho. ?25",514. Divides-and. this application filed March 19, em. semi Lilo. 755,5s7.

floors 30, and through fines 31, to the oven chamber 32' under control of the dampers 353iw actuated by shafts 34 and levers 35. Flues 36 extend from tunnels 25 and 2'? through Wallli to a discharge duct 38 under control of the dampers 3?,

7 is a gas-tight sheet metal drum in the upper part of the ovenchainher with a narrow space around its top for hot air. This ,drum is of peculiar shape to relate it in an advantageous Way to the rotary pan carriers, as will be described.

Within the drum there is a rotary reel structure having a shaft 8 supported in bearings 9 in Walls 5 and 6. .The shaft carries spiders having radial arms 1O jointed to hubsll secured to the shaft, these arms be- 13, 13 areshafts supported on arms 10.

through shafts 13 With arms 10;

An object or the invention is to condense.

the region in whichthe system, as an en tirety, of bread trays Willalways be con-i 1 14; indicate the 4 bread trays each having hinge connection of the same size and character so that the loading and the unloading can be uniformly The radius upon wh ch each swings in relation to its supporting shaft 10 is long, in respect to the total radius froin the tray to the shaft 8, this radius of swing of the tray being considerable more than a third or" the total raclius from the tray to the said shaft. {lonscquently the trays can be caused to revolve in a region which is of short radius, that is to say, they are arranged compactly in rel tively small space around the reel aXl lower half of the drum are flattened relw Lveiy to a cylinder concentric with the shaft i. a l.

8, so that the sheet metal both at the top and, the bottom can he brought in close to the path of the trays; and, as above noted, this is close to the median axis of their travel. l e. this respect the construction and arrangement of the trays and their carrier are to be distinguished from earlier struc- E,:.ii the upper half and the tures'in which long radial arms, rigiti with.

tl'ie central shaft were used, and which at their ends carried narrow trays on short radii of hinging; the earlier constructions referred to requiring large chambers, with wide dissemination of heat, and loss. They are also to be distinguished "from the earlier constructions in which trays of varying sizes were employed, each swinging on the reel or carrie' at an axis differing, in its radial distance from the main centenfrom the axes on which the neighboring tray is swung. The swinging of the trays on lohg radii from their shafts 13 increases the possibility for them to swing relatively long distances in case of any unevenness of movement of the reel, or jolts resulting from stoppagesor starts, and correspondingly increases the tendency for the trays to interfere or positively engage with each other as they move through those parts of their path near the central vertical longitudinal plane of the shaft 8. y

The bottoms 14 of the trays are suspended by brackets and hinge bearings 14 which, by bars or stops, are connected to the metal part or frame of the tray. In Fig. l the trays are shown as made of metallic pans forming part of the rotary system.

In Fig. 6 they are shown as having an open framework formed of longitudinal rods 39 and cross rods 40 upon which is supported a stone or earthenware bottom 14. Cast metal is omitted because of its liability to breaking. The grid 39, 40 has the ends of its bars fastened to wrought angle irons which are attached to the bracket arms. The soapstone, or other stone-like hearth piece, lifliis exposed over its whole surface, practically, and at the same time is supportend in such way that in case of breakage no parts, of any size, will drop upon the trays below. 7

To prevent the trays, respectively, from engaging with neighbors in case any one of them should swing on its long radius from the shaft 13, we provide each side oi caeh tray with guides or tenders 14L". tivelylong curved strips which are extended to points considerably below the tray, as shown in 'Fig. 4-. The lower ends of these guide fenders are curved toward the central longitudinal vertical plane of the tray, so that in case of any contact with the next tray at a time considerably before they come to the same horizontal plane, they will be brought to such plane without any positive interengagementQ To still further guard against such engagement or hooking or restmg of one upon another, the fender bars can be extended upward, as shown. on the lower trays in Fig. 4:. These guides revolve with the trays in paths, the upper part of l They are rel a-- each of which is approximately a semi-eh lipse with its longer axis horizontal, and the lower part of which is an ellipse of another curvature. The gas-tight heating drum 7 is correspondingly shaped so that these guides or tray-separating means can revolve close to the drum as they move through the lower parts of their paths, this bringing both the trays and their guides close to the source of heat radiation, but without danger of contact with the drum.

The trays are loaded through an opening at 16. The tray carrying reel is rotated by the gear 17, worm 18, shaft 19, beltpulley 20, under control of the clutch and lever at v relatively long radius of swing from its hinge axis, all of said axes being uniformly distant from the reel axis whereby the trays are caused to revolve relatively to the reel within a region of short radius from the reel axis, the gas-tight reel inclosing drum, and guide means at each side of each tray and carried thereby for preventing the trays respectively from positively engaging with an adjacent tray when they contact, said. means revolving in paths each of which has an upper part approximately conforming to an oval of one curvature and its lower part approximating an oval of another curvature and said drum having the lower part of its wall arranged in close proximity to the lower part of the path of said means 2. The combination of the reel, the series of uniformly sized trays, the tray carriers each pivoted to the reel at a hinge axis relatively close to the reel axis and having a relatively long radius of swing from its hinge axis, all of said axes being uniformly distant from the reel axis whereby the trays are caused torevolve relatively to the reel within a region of short radius from the reel axis, the gas-tight reel-inclosing drum and guide means at each side of each tray and carried thereby consisting of curved bars extending downward to points below the tray for preventing the trays respectively from positively engaging with an adjacent tray when they contact. a

in testimony whereof we affix our signatures in the presence of two witnesses. 

